640152240334664 has 32 divisors (see below), whose sum is σ = 1206315944769600. Its totient is φ = 318468848617920.

The previous prime is 640152240334609. The next prime is 640152240334723. The reversal of 640152240334664 is 466433042251046.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47808419 + ... + 59715570.

It is an arithmetic number, because the mean of its divisors is an integer number (37697373274050).

Almost surely, 2^{640152240334664} is an apocalyptic number.

It is an amenable number.

640152240334664 is a deficient number, since it is larger than the sum of its proper divisors (566163704434936).

640152240334664 is a wasteful number, since it uses less digits than its factorization.

640152240334664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107527733 (or 107527729 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 50.

The spelling of 640152240334664 in words is "six hundred forty trillion, one hundred fifty-two billion, two hundred forty million, three hundred thirty-four thousand, six hundred sixty-four".